JPS6213353A - Liquid-drop jet type recorder - Google Patents

Abstract

PURPOSE:To obtain very simply the negative record the recording part of which shows light color relatively against the dark color of its substrate, by a method wherein the record paper on the recording surface of which dark ink is coated, is provided and the erasing liquid for ink is jetted onto the recording surface as the drop of liquid. CONSTITUTION:The recording paper 2 situated at the front of a platen 1 is transferred in the arrowed mark direction via a paper-feeding mechanism. This recording paper is preliminarily coated with the dark color ink of black, blue, red, etc. on its front recording surface 3 to be dried. Therefore, all the recording surface 3 is tinged with dark substrate color. The liquid drop jet type recording head 4 moving in the width direction of recording paper via a carriage is situated at the front of the recording paper 2. This liquid drop jet type recording head 4 stores the erasing liquid for the ink spread on the recording surface 3 in its inside. When it is jetted onto the recording surface 3 of recording paper 2 as the shape of liquid drop 5, the ink on the recording surface 3 of the part adhered with the liquid drop 5 disappears and the record 6 of light color is visibly formed on the dark substrate.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a droplet jet recording device for forming a negative record, that is, a high brightness (bright color) record on a low brightness (dark color) background. More specifically, CRT display (hereinafter abbreviated as CRT).

) and other images to match their black and white representation to make them suitable for hard copying.

[Prior Art] Techniques for making hard copies of CRT images are conventionally known. The base of CRT is a dark area, whereas the signal area is a bright area. Therefore, in a hard copy of a CRT image, a colored pattern corresponding to a signal area is usually formed on white recording paper. However, in the medical field, which uses X-ray equipment, ultrasound diagnostic equipment, CT scanners, etc., for example, in order to make a diagnosis by looking at the image displayed on a CRT, a hard copy that matches the black and white representation of the CRT image is required. may be required.

One of the techniques to meet such demands is a method of directly taking a photograph of a CRT image. Additionally, when making hard copies of CRT images using a dot printer, the control circuit must be devised to invert the image signal so that the dark areas of the CRT become signals, thereby obtaining a record that matches the black and white representation of the CRT image. I was doing it.

[Problems to be Solved by the Invention] The former method is troublesome to handle, has a limited recording size, and has high running costs. The latter method has disadvantages in that the print duty becomes extremely high, current consumption increases, and the print head is also exposed to high temperatures, which places a large burden on the printer. There were also problems with image quality.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to make it possible to extremely easily obtain a negative record in which the base is dark and the recorded area is relatively bright.

[Means for Solving the Problems] A recording device according to the present invention includes a recording paper whose recording surface is coated with dark ink, and an erasing liquid of the ink directed toward the recording surface in the form of droplets. It consists of a droplet ejecting recording head.

[Function] When the erasing liquid of the ink is injected onto the recording surface of the recording paper coated with dark-colored ink through a droplet jet recording head, the color of the ink, i.e., the recording, is erased by the action of the ink erasing liquid. The surface color is bleached.

However, a bright visible record is formed on the dark recording surface.

[Example] In FIG. 1, the recording paper 2 located in front of the platen 1
is sent in the direction of the arrow via a paper feeding mechanism (not shown).

This recording paper 2 has dark colored ink such as black, blue, or red coated and dried on the front recording surface 3 of the recording paper 2 in advance. Therefore, the entire surface of the recording surface 3 exhibits a dark base color. A droplet jet recording head 4 is positioned in front of the recording paper 2 and moves in the width direction of the recording paper via a carriage 7 (not shown).

The droplet jetting recording head 4 has a built-in erasing liquid for the ink applied to the recording surface 3, and is configured to jet it in the form of droplets 5 toward the recording surface 3 of the recording paper 2. It has become. Ink and erasing liquid for fountain pens can be used.

When the ink erasing liquid is ejected in the form of droplets 5 onto the recording surface 3 of the recording paper 2 via the droplet jetting head 4, the ink on the recording surface 3 in the area to which the droplets 5 have adhered disappears, as shown in FIG. As shown, a bright color record 6 is visibly formed on a dark background.

[Effects of the Invention] According to the present invention described above, it is very easy to obtain a relatively high-brightness record on a dark background, and it is very easy to obtain a relatively high-brightness record on a dark background. It is possible to meet various demands without using a special control circuit, and the printing duty is much lower than that of known methods, so there is no burden on the printer side.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a schematic configuration of the present invention, and FIG. 2 is a front view of a recording paper on which a negative record has been formed. 2...Recording paper 3...Recording surface 4 coated with dark ink...
Droplet jet recording head 5... Droplets of ink erasing liquid or more

Claims (1)

[Claims] A liquid droplet comprising a recording paper whose recording surface is coated with dark ink, and a droplet jet recording head that jets an erasing liquid of the ink toward the recording surface in the form of droplets. Injection type recording device.